Appendix 05 - 1
APPENDIX 05: Skymap IIIC Serial Data Output Sentences.
Skymap IIIC can output standard aviation RS232 data at 9600 baud or NMEA 0183 format RMC, GGA
and RMB sentences at 4800 baud. The data output type is Setup on Screen 35 Data input/output
Setup and Test Screen.
NMEA 0183 Data Format.
4800 baud, 8 data bits, 1 stop bit, no parity. Each sentence is followed by a checksum (*hh), carriage
return (CR) and a line feed (LF). All three sentences sent every two seconds.
NMEA – RMC Sentence.
$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,
<10>,<11>*hh<CR><LF>
<1> UTC time of position fix, hhmmss format.
<2> Status, A= Valid position, V=warning
<3> Latitude,ddmm.mmm format.
<4> Latitude hemisphere, N or S.
<5> Longitude, dddmm.mmm format.
<6> Longitude hemisphere, E or W.
<7> Speed over ground (000.0-999.9 knots).
<8> Course over ground (000.0-359.9 true).
<9> Date of fix ddmmyy format.
<10> Magnetic variation 000.0-180.0
o
.
<11> Variation direction E or W.
Sample sentence.
$GPRMC,132404,A,5111.465,N,00102.845,W,090.0,304.1,020492,004.3,W*7A
NMEA – GGA Sentence.
$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,,*hh<CR><LF>
<1> UTC time of position fix, hhmmss.
<2> Latitude, ddmm.mmm format.
<3> Latitude hemisphere, N or S.
<4> Longitude dddmm.mmm format.
<5> Longitude hemisphere, E or W.
<6> GPS quality. 0 = no fix, 1 = fix good, 2 = fix good, differential mode.
<7> Number of sats in use, 00 to 08.
<8> DOP, 01.0 to 99.0.
<9> Antenna height above MSL (metres).
<10> Geoidal offset in metres.
Sample sentence.
$GPGGA,091636,5119.607,N,00122.001,E,1,04,1.8,18.3,M,-47.0,M,,*5D
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